Repository navigation
nvImageCodec Warning Too Frequent #9133
Description
Describe the bug
The following warning is being printed whenever MONAI is imported without the mentioned libraries:
Failed to load nvtiff library! Please install nvTIFF (see https://docs.nvidia.com/cuda/nvtiff/userguide.html#installing-nvtiff).
Note: If using nvImageCodec's Python distribution, it is enough to install the nvTIFF wheel: e.g. `python3 -m pip install nvidia-nvtiff-cu13`
[ERROR] [nvtiff_ext] Failed to load nvTIFF library or retrieve version. Decoders and encoders will not be registered.
Failed to load nvjpeg2k library! Please install nvJPEG2000 (see https://docs.nvidia.com/cuda/nvjpeg2000/userguide.html#installing-nvjpeg2000).
Note: If using nvImageCodec's Python distribution, it is enough to install the nvJPEG2000 wheel: e.g. `python3 -m pip install nvidia-nvjpeg2k-cu13`
[ERROR] [nvjpeg2k_ext] Failed to load nvJPEG2000 library or retrieve version. Decoders and encoders will not be registered.These are important if a user is attempting to use the new NvImgCodecPydicomReader class for accelerated DICOM reading, but these shouldn't appear until that time. I think the time at which the imports are attempted in NvImgCodecPydicomReader or in nvimgcodec_pydicom_plugin.py can be shifted around to be later rather than at MONAI's import time.
To Reproduce
Steps to reproduce the behavior:
- import MONAI without nvidia-nvtiff-cu13 or nvidia-nvjpeg2k-cu13
Expected behavior
No warning.
Metadata
Metadata
Labels
Type
Projects
- Status
Activity
ericspod commentedon Sep 26, 2026
Hi @MMelQin I should have considered this with your PR introducing the feature, but we can look into this in follow-up work for the next release.
vikasreddy11 commentedon Oct 12, 2026
Hi @ericspod @MMelQin, I’d be interested in helping with this. Are you both already working on it, or is there a part I could take, such as making the nvTIFF/nvJPEG2000 imports lazy? Happy to wait for your guidance before starting
ericspod commentedon Oct 12, 2026
Hi @vikasreddy11 if you'd like to suggest a PR to fix the issue it would be appreciated. I think there's a way of moving the imports into a method somewhere which isn't invoked until a user tries to load Dicom data, if you wanted to look into where that would be we can review a PR on the solution. Thanks!
vikasreddy11 commentedon Oct 14, 2026
Thanks for the suggestion! I've opened #9176 to exclude
nvimgcodec_pydicom_pluginfrom eager submodule loading during MONAI initialization and added a regression test to verify thatnvidia.nvimgcodecis not imported automatically. Feedback on the approach is welcome.